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  • #96 - Don't Look Up: How World Ventilate Day Is Fighting Apathy in Indoor Air Quality
    2025/11/03
    In this special episode, we sit down with the founders and champions of World Ventilate Day (November 8th) to dissect the critical difference between air quality and ventilation. They reveal why their focus is on action, agency, and empowering everyone—from homeowners to governments—to take control of their indoor environments. Key Discussion Points: Action vs. Nuance: Why the day focuses on ventilation (the action) rather than the more nuanced conversation around air quality. The Agency Angle: How ventilation provides agency at every level, from national governance to managing your own home. Beyond Air Quality: Why ventilation is critical not just for air, but for managing a building's thermal environment, humidity, comfort, and energy. The Pandemic's Legacy: The shocking realisation during COVID that "we haven't got a clue" about the ventilation in our buildings, and the danger of apathy today. The Collaboration Imperative: Discussing the theme 'Collaborate to Ventilate' and the need for engineers and building users to work together. What We're NOT Talking About: The panellists share their most pressing overlooked topics, including the destructive power of apathy , the complexity of real-world ventilation , and the urgent need for competence and accountability in the industry. Reframing Success: Why we need to measure the performance and outcomes of ventilation, not just the existence of a product. Chapters 00:00:00 Introduction: World Ventilate Day and Its Mission 00:02:25 Why Ventilation, Not Just Air Quality? 00:06:25 The Origins: How World Ventilate Day Began 00:09:02 The Pandemic Wake-Up Call: What We Didn't Know 00:17:10 Breaking Down Engineering Barriers Through Collaboration 00:21:56 Ventilation Engineers: The Hidden Health Heroes 00:23:45 The Lungs as Filters: A Powerful Analogy 00:28:57 The Future of World Ventilate Day: Going Global 00:34:21 Fighting Apathy: The Destructive Power of Indifference 00:38:12 The Complexity Challenge: Beyond Simple Solutions 00:43:52 The Competence Crisis: When Good Intentions Go Wrong 00:49:16 Reframing Success: From Products to Performance World Ventilate Day: November 8th. Find out more and get involved: https://www.worldventil8day.com/ Cath Noakes Henry Burridge Nathan Wood #81 - Nathan Wood #15 Cath Noakes #7 Henry Burridge The Air Quality Matters Podcast in Partnership with Zehnder Group - Farmwood - Eurovent- Aico - Aereco - Ultra Protect - The One Take Podcast in Partnership with SafeTraces and Inbiot Do check them out in the links and on the Air Quality Matters Website.
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  • One Take #24: Association vs. Causation - Why Proving Mold Makes You Sick Is So Hard
    2025/10/30
    Why is it so difficult to prove that mold makes people sick when millions of people clearly suffer in water-damaged buildings? The association is undeniable. The causation? That's where things get complicated. This episode unpacks a fundamental challenge that has plagued the mold and health field for decades – the seemingly simple but scientifically complex distinction between association and causation. We know with certainty that people in damp, moldy buildings experience more respiratory symptoms, asthma exacerbations, and various health complaints. The 2004 Institute of Medicine report established this definitively, finding "sufficient evidence of an association" between visible mold and respiratory symptoms. But proving that mold directly causes these problems? That's an entirely different scientific mountain to climb. The core challenge lies in what scientists call the Bradford Hill criteria – the gold standard for establishing causation in epidemiology. To prove mold causes illness, we'd need to demonstrate a clear dose-response relationship (more mold equals more illness), temporal relationships (exposure before symptoms), biological plausibility, and ideally, experimental evidence. But here's the rub: mold exposure in real buildings is never just mold exposure. It's a complex soup of fungal spores, bacterial endotoxins, volatile organic compounds, allergens, and chemical emissions from degrading materials. How do you isolate the effect of one component in this biological cocktail? The Exposure Assessment Black Hole Perhaps the most maddening aspect is our inability to accurately measure what people are actually exposed to. Unlike a drug trial where you know exactly what dose someone received, mold exposure is invisible, variable, and cumulative. A single air sample tells you almost nothing about someone's exposure over weeks or months. Spore counts fluctuate wildly based on humidity, disturbance, and time of day. Some people might react to dead spores or fragments that don't even show up in standard tests. Others might be sensitive to mycotoxins at levels far below what we can reliably detect. This measurement problem creates a vicious cycle. Without good exposure data, we can't establish dose-response relationships. Without dose-response relationships, we can't prove causation. Without proven causation, there's less funding for better measurement tools. And round and round we go. The Human Variability Factor Then there's the inconvenient fact that people react differently to the same environment. Genetics, immune status, age, pre-existing conditions – all these factors influence whether someone develops symptoms in a moldy building. This heterogeneity makes it nearly impossible to predict who will get sick and how sick they'll get, further muddying the causation waters. The episode explores how this scientific uncertainty has real-world consequences. Insurance companies exploit the causation gap to deny claims. Building owners hide behind the lack of "proof" to avoid remediation. Meanwhile, people suffering in water-damaged buildings are told their symptoms might be "all in their head" because science can't definitively prove the mold is making them sick. The Path Forward Despite these challenges, the scientific consensus is clear on one point: water-damaged buildings are unhealthy environments that should be remediated, regardless of whether we can prove specific causal pathways. The precautionary principle applies – we know enough about the associations to act, even if we can't draw straight lines from exposure to illness. This One Take reveals why the mold and health field remains so contentious and why simple questions like "is mold making me sick?" don't have simple answers. It's a sobering reminder that in environmental health, the gap between what we observe and what we can scientifically prove often feels insurmountable – not because the connections aren't real, but because reality is far more complex than our measurement tools and study designs can capture. Damp Indoor Spaces and Health (2004) The Air Quality Matters Podcast in Partnership with Zehnder Group - Farmwood - Eurovent- Aico - Aereco - Ultra Protect - The One Take Podcast in Partnership with SafeTraces and Inbiot Do check them out in the links and on the Air Quality Matters Website. If you haven't checked out the YouTube channel its here. Do subscribe if you can, lots more content is coming soon.
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  • #95 - Chandra Sekhar: From Singapore to Ireland: How Different Climates Shape Our Approach
    2025/10/27
    When Worlds Collide: Tropical Wisdom Meets Temperate Challenges In this wide-ranging discussion, Chandra brings over 35 years of experience from Singapore's hot, humid environment to share insights that challenge conventional thinking about ventilation and comfort. As one of three pioneers who established Singapore's indoor air quality research unit in the early 1990s, his team's tagline – "energy efficient, healthy buildings" – has guided decades of innovation in tropical building design. The conversation reveals striking contrasts: while European buildings might operate at 21-23°C, Singapore's newest net-zero buildings maintain comfort at 26-27°C using elevated air speeds from ceiling fans. This isn't just about energy savings – it's a fundamental rethinking of how we achieve thermal comfort. As Chandra explains, tropically-acclimatized people actually prefer air movement, unlike those from colder climates who perceive it as draft. Chapters 00:00:00 Introduction: Meeting a Legend of Indoor Air Quality 00:02:08 Air Quality as a Human-Centered Challenge 00:23:17 Making the Invisible Visible: Sensors and Awareness 00:42:58 Hot and Humid Climates: Engineering Lessons from Singapore 00:52:50 Decoupling Ventilation from Cooling: A Revolutionary Approach 01:00:55 Net-Zero Buildings and Adaptive Comfort 01:12:25 Global Equity and Simple Solutions 01:23:30 Building Preparedness and Future Resilience Chandra Sekhar - LinkedIn https://www.linkedin.com/in/professor-chandra-sekhar-singapore/ The Air Quality Matters Podcast in Partnership with Zehnder Group - Farmwood - Eurovent- Aico - Aereco - Ultra Protect - The One Take Podcast in Partnership with SafeTraces and Inbiot Do check them out in the links and on the Air Quality Matters Website. If you haven't checked out the YouTube channel its here. Do subscribe if you can, lots more content is coming soon.
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  • One Take #23: Why Wall Street is Betting on Healthy Buildings (And You Should Too)
    2025/10/23
    Welcome back to Air Quality Matters and One Take as we explore a fascinating convergence of finance, health, and real estate that's reshaping how Wall Street thinks about buildings. What happens when the financial markets discover that healthy buildings aren't just good for people – they're good for portfolios? This episode unpacks a compelling business case that's turning heads in boardrooms and investment committees worldwide. We dive into groundbreaking research from the International WELL Building Institute that fundamentally reframes how we think about building costs through a simple but powerful concept: the 90-9-1 rule. Think about it: for a typical business, only 1% of costs go to energy, 9% to real estate, and a staggering 90% to people – salaries, benefits, human capital. Yet for decades, the entire green building movement has obsessed over shaving pennies off that 1% energy slice while ignoring the massive opportunity sitting in the 90%. As the research reveals, a mere 1% improvement in productivity through better indoor environmental quality is financially equivalent to eliminating your entire energy bill. The Numbers That made Wall Street Take Notice The evidence is striking. Harvard's COG-fx study shows that enhanced ventilation and lower VOCs can boost cognitive function scores – translating to $6,500-7,500 per employee annually in improved productivity. That's not theoretical; that's measurable impact on decision-making, creativity, and performance. Buildings with health certifications like WELL command 4.5-7.7% higher rents and secure lease terms over a year longer than their conventional counterparts. This isn't just about feeling good – it's about financial fundamentals. But here's where it gets really interesting: the financial markets themselves are now rewarding healthy buildings with cheaper capital. Sustainability-linked loans and social bonds are tying interest rates directly to achieving health and wellness targets. When your building's WELL certification can literally reduce your borrowing costs, you know the market has crossed a tipping point. Beyond Productivity: The Hidden Costs of Unhealthy Buildings The report goes deeper than just productivity gains. It tackles the twin demons of absenteeism (people not showing up) and presenteeism (people showing up but functioning poorly). Poor air quality, inadequate lighting, and thermal discomfort create a constant drain on organizational performance that most companies never even measure. Fix these issues, and you're not just adding value – you're plugging leaks that have been hemorrhaging money for years. The conversation also explores specific strategies that deliver returns: biophilic design that goes beyond token plants to create genuine connections with nature, daylighting that improves both work performance and sleep quality, and ventilation strategies that keep people sharp throughout the day rather than suffering through afternoon brain fog. The ESG Revolution's Next Chapter Perhaps most significantly, this shift represents the maturation of ESG investing. While the 'E' (environmental) has dominated for years, the 'S' (social) is finally being recognized as financially material. How companies treat their most valuable asset – their people – directly impacts long-term viability and profitability. Top-tier corporations engaged in the war for talent are actively seeking and paying premiums for spaces that support employee wellbeing. This episode reveals how investing in healthy buildings has evolved from a nice-to-have amenity to a strategic imperative. The business case is no longer theoretical – it's robust, quantified, and being proven daily in real estate markets worldwide. When Wall Street starts betting on healthy buildings, you know we've reached an inflection point where doing good and doing well are finally, undeniably aligned. IWBI Investing in Health Pays Back The Air Quality Matters Podcast in Partnership with Zehnder Group - Farmwood - Eurovent- Aico - Aereco - Ultra Protect - The One Take Podcast in Partnership with SafeTraces and Inbiot Do check them out in the links and on the Air Quality Matters Website. If you haven't checked out the YouTube channel its here. Do subscribe if you can, lots more content is coming soon.
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  • One Take #22: From Lab Tests to Leaks - Why Doctors Say Focus on Dampness, Not Spores
    2025/10/16
    Welcome back to Air Quality Matters and One Take as we dive into a German medical guideline that fundamentally challenges how we think about mold diagnosis and testing. What if everything we've been told about measuring mold to prove it's making us sick is wrong? This episode unpacks the 2023 AWMF Mold Guidelines, a comprehensive consensus document from the German Association of Scientific Medical Societies that brings together hygienists, immunologists, dermatologists, and other experts to cut through decades of confusion about indoor mold exposure. Their message is both radical and refreshingly simple: stop chasing spores, start fixing dampness. The guideline drops several bombshells that challenge conventional wisdom. First, they state unequivocally that if you can see mold, you don't need to sample it – just remove it. Environmental measurements of mold, mycotoxins, or microbial VOCs? They declare these "rarely useful" for medical diagnosis. In fact, they go so far as to say that monitoring mycotoxins in indoor air has "no indication in medical diagnostics." For an industry that's built around testing and quantification, this is revolutionary. The Focus Shift: From Lab Tests to Leaks The document's core philosophy centers on the precautionary principle: mold shouldn't be tolerated indoors, period. Not because we can definitively prove it causes specific diseases, but because it represents a hygiene problem with potential health risks. The primary recommendation isn't complex – identify the moisture source and fix it. The building, not the lab report, becomes the focus of intervention. When it comes to health effects, the guideline draws clear boundaries. They recognize two categories: general irritant effects (itchy eyes, runny nose, mood disturbances) and specific clinical conditions, which are overwhelmingly allergic reactions and, rarely, infections in immunocompromised individuals. Notably absent from their list of proven associations are chronic fatigue syndrome, neurotoxic effects, and autoimmune diseases – conditions often attributed to mold but lacking sufficient scientific evidence for causation. Diagnosing Without Air Samples For doctors facing patients who believe mold is making them sick, the guideline prescribes a traditional allergy workup: detailed medical history, skin-prick tests, specific IgE antibody measurements, and if necessary, provocation testing. It's the same process used for pollen or dust mite allergies – no air sampling required. They even provide a list of diagnostic methods to avoid, including bioresonance procedures and mycotoxin blood tests, firmly planting their flag in evidence-based medicine. The document identifies clear risk groups requiring special protection: severely immunosuppressed patients, those with cystic fibrosis, and people with existing asthma. For these individuals, mold isn't just an irritant – it can pose serious infection risks. The Uncomfortable Truth Perhaps most striking is the guideline's honesty about what we don't know. They acknowledge that we lack established health-based guideline values for mycotoxins in air, can't draw clear dose-response relationships between measured concentrations and symptoms, and simply don't have the science to support many claimed mold-illness connections. This isn't dismissive – it's scientifically honest. The implications are profound for building managers, indoor air quality professionals, and anyone dealing with mold complaints. The message is clear: stop endlessly measuring what we can't interpret and start addressing the root cause – moisture. It's a pragmatic, precautionary approach that prioritizes action over analysis paralysis. This episode reveals how Germany's medical establishment is pushing back against the tendency to overcomplicate mold issues, offering instead a clear-eyed, evidence-based framework that separates what we know from what we merely suspect. For anyone navigating the murky waters of mold and health, this guideline offers a much-needed compass. AWMF mold guideline “Medical clinical diagnostics for indoor mold exposure” – Update 2023 AWMF Register No. 161/001 The Air Quality Matters Podcast in Partnership with Zehnder Group - Farmwood - Eurovent- Aico - Aereco - Ultra Protect - The One Take Podcast in Partnership with SafeTraces and Inbiot Do check them out in the links and on the Air Quality Matters Website. If you haven't checked out the YouTube channel its here. Do subscribe if you can, lots more content is coming soon.
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  • #93 - Janet Price: The Far UVC Revolution
    2025/10/13
    Welcome to Air Quality Matters as we illuminate a revolutionary that's been quietly transforming how we think about infection control in our built environment. In this episode, we dive into the world of far UVC light with Janet Price, Chief Science Officer at Visium, who brings an exceptional blend of molecular biology expertise and real-world application experience to this fascinating conversation. The Invisible Warrior Against Invisible Threats Far UVC represents a specific wavelength of light (222 nanometers) that exists beyond our visible spectrum – a form of energy that naturally occurs in space but never reaches Earth's surface due to atmospheric absorption. What makes this technology so compelling is its dual-action mechanism: it simultaneously damages both DNA/RNA and proteins in pathogens, essentially fighting a war on multiple fronts against viruses, bacteria, and even mold spores. Yet remarkably, this same light that devastates single-cell organisms can't penetrate the dead skin layer protecting our living tissue – making it safe for continuous human exposure. Janet walks us through the science with remarkable clarity, explaining how these krypton gas-filled lamps produce their precise wavelength and why that specificity matters. Unlike the broad-spectrum mercury bulbs used by Wells nearly a century ago, today's far UVC technology delivers targeted germicidal action without the risks associated with traditional UVC exposure. The conversation reveals how a minute of exposure can inactivate 50% of flu viruses in a space, potentially reducing transmission risk by up to 91% in typical office settings. The Path Forward Perhaps most thought-provoking is Janet's perspective on what's needed for widespread adoption. Like Wells before her, she recognises that the technology works – the science is clear, the standards are emerging (UL 8082 certification now exists specifically for far UVC devices), but the epidemiological evidence at the population scale remains elusive. We need, as she puts it, someone willing to create "the cleanest town in the world" to demonstrate what's possible when we treat our air as seriously as we treat our water. The conversation also confronts uncomfortable truths about our post-pandemic fatigue and the funding cliff that's left many promising technologies stranded. Yet Janet's optimism is infectious – she sees a future where cleaning our air requires nothing more from people than showing up and breathing, where invisible light fights invisible threats without anyone having to change their behavior. This episode offers both a masterclass in emerging technology and a rallying cry for those who believe indoor air quality deserves the same attention we've given to clean water and food safety. It's essential listening for facility managers, healthcare administrators, engineers, and anyone curious about how we might finally win the war against airborne pathogens – not through behavior change or constant vigilance, but through the simple application of the right wavelength of light. Janet Price - LinkedIn Visium The Air Quality Matters Podcast in Partnership with Zehnder Group - Farmwood - Eurovent- Aico - Aereco - Ultra Protect - The One Take Podcast in Partnership with SafeTraces and Inbiot Do check them out in the links and on the Air Quality Matters Website. If you haven't checked out the YouTube channel its here. Do subscribe if you can, lots more content is coming soon.
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  • One Take #21: Jordan Peterson, Mold Diagnosis & The CIRS Controversy Explained
    2025/10/09
    Welcome back to Air Quality Matters and One Take as we look into one of the more contentious debates in environmental health – a controversy that's suddenly captured mainstream attention following Jordan Peterson's recent diagnosis with Chronic Inflammatory Response Syndrome (CIRS) linked to mold exposure. When a prominent public intellectual gets this diagnosis, it forces us all to confront an uncomfortable question: what do we really know about the health effects of water-damaged buildings? This episode unpacks the deep divide between two competing narratives about mold and chronic illness. On one side, Dr. Ritchie Shoemaker and his followers describe CIRS as a biotoxin-triggered condition affecting genetically susceptible individuals – about 25% of the population who lack the ability to clear these toxins from their bodies. Their detailed protocol, complete with specific biomarkers like transforming growth factor beta-1 and visual contrast sensitivity tests, has reportedly helped thousands recover from debilitating symptoms: extreme fatigue, brain fog, chronic pain, and respiratory issues that conventional medicine couldn't explain. On the other side stands the medical establishment – the CDC, WHO, and major medical colleges – who don't recognize CIRS as a valid diagnosis. Their argument rests on fundamental toxicology: the dose makes the poison. While nobody disputes that mold causes allergies, asthma, and respiratory infections, mainstream scientists argue that the mycotoxin concentrations in typical water-damaged buildings are orders of magnitude below levels that could cause systemic toxic effects. They point to a critical weakness in the CIRS evidence base: virtually all supporting research comes from Shoemaker's own clinical group, with no large-scale independent validation. The Australian Government's Response: A Pragmatic Policy? Perhaps the most illuminating perspective comes from Australia's formal 2018 inquiry into biotoxin-related illnesses. They listened to everyone – desperate patients, CIRS practitioners, and peak medical bodies. Their conclusion was nuanced: while they sided with mainstream medicine in not recognizing CIRS as a valid diagnosis, they didn't dismiss the patients. Instead, they created a national clinical pathway that takes exposure histories seriously while grounding treatment in evidence-based medicine – a framework for providing compassionate care without endorsing a scientifically contested diagnosis. The episode explores how this creates a self-perpetuating cycle: without mainstream acceptance, it's nearly impossible to secure funding for large studies, but without those studies, mainstream acceptance remains elusive. High-profile cases like Peterson's might finally break this deadlock, forcing the urgent, focused research effort needed to provide clear, independently verified answers. The Universal Agreement Despite the fierce debate over mechanisms and diagnoses, one thing unites all parties: mold is harmful, and remediation of water-damaged buildings must always be the first course of action. Whether you believe in CIRS or stick to conventional medicine, everyone agrees that fixing the environment comes first. This One Take tries to offer a balanced exploration of a polarising topic, acknowledging both the genuine suffering of patients seeking answers and the scientific rigour required to establish new medical paradigms. It's essential listening for anyone trying to navigate the complex intersection of environmental health, medical controversy, and the very human need for answers when conventional medicine falls short. As the Latin phrase reminds us: sola dosis facit venenum – the dose makes the poison. The Air Quality Matters Podcast in Partnership with Zehnder Group - Farmwood - Eurovent- Aico - Aereco - Ultra Protect - The One Take Podcast in Partnership with SafeTraces and Inbiot Do check them out in the links and on the Air Quality Matters Website. If you haven't checked out the YouTube channel its here. Do subscribe if you can, lots more content is coming soon.
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  • #92 - Tanya Kaur Bedi: Healthy Buildings India 2025 Part 3: The Inhalable Diet
    2025/10/06
    Welcome back to Air Quality Matters as we conclude our special series from Healthy Buildings 2025 in Hyderabad with a fascinating conversation that reframes how we think about the air we breathe. What if we started thinking about air quality as our 'inhalable diet'? This compelling question drives our discussion with Tanya Kaur Bedi, assistant professor at the School of Planning and Architecture in Bhopal, who brings a uniquely personal and practical perspective to indoor environmental quality. The conversation begins with a powerful comparison: while we meticulously track our 1,500-2,000 daily calories, we completely ignore the 10,000-15,000 litres of air we breathe every day. As Tanya points out, we're having an inhalable diet right now as we speak, as we sleep, as we work – yet it remains the least discussed aspect of our health. Her own journey into this field began with a personal mystery: persistent acne that disappeared only when her roommate changed her perfume, revealing how our daily 'breakfast' of air can profoundly impact our health without us even knowing. From an architectural perspective, Tanya reveals how air quality is beginning to reshape India's real estate landscape. Friends with infants developing pulmonary issues are being told by doctors to leave Delhi – not as a suggestion, but as the primary medical intervention. This migration pattern, though still emerging, signals a fundamental shift in how Indians value clean air versus economic opportunity. The Middle-Income Reality Perhaps most revealing is Tanya's research into middle-income Indian homes. These families rely almost entirely on natural ventilation, adjusting their lives to the environment rather than controlling it through mechanical systems. In summer, entire families might sleep in the one air-conditioned room they can afford. This means for most Indians, the quality of outdoor air directly determines their indoor exposure – a sobering reality when Delhi regularly tops global pollution charts. The discussion takes a fascinating turn into the composition of household dust. While outdoor dust contains traffic emissions and construction particles, indoor dust tells a different story – it's full of microplastics from degrading bottles and bags, pet dander, and chemical emissions from furniture. As Tanya notes, you can know about a person's life from their dust, making it a kind of environmental diary we never read. Design Solutions and Cultural Practices As both architect and interior designer, Tanya advocates for conscious limitation – the idea that more isn't always better when it comes to materials and finishes. She reveals practical design strategies: rounded furniture corners that prevent dust accumulation, avoiding recessed lighting that becomes a heating element for trapped particles, and the radical simplicity of using local, known materials like mud and bamboo over complex chemical products. The conversation also celebrates existing Indian practices that support air quality – the daily dusting, mopping and sweeping rituals that might seem obsessive but actually serve a vital health function. Yet it also confronts uncomfortable truths: the lower your income, the fewer choices you have about materials and location, creating an inequitable distribution of air quality risks. The Path Forward Tanya's current research into the seasonal aspects of our inhalable diet – how festivals, weather patterns, and cultural practices create different exposure profiles throughout the year – offers a uniquely Indian perspective on air quality science. Her focus on residential spaces addresses a critical research gap, as homes remain the least studied yet most important environments for long-term health. The conversation concludes with a call for awareness and agency. While we might not control our environment completely, we can trust our senses more, ask questions about the products we bring into our homes, and make small behavioural changes that accumulate into healthier spaces. As India's 1.4 billion people become more aware of their inhalable diet, the potential for market transformation is enormous. This episode offers a fresh lens for understanding air quality – not as an abstract environmental issue, but as a daily consumption choice as fundamental as the food we eat. It's a perspective that makes the invisible visible and the complex actionable, perfect for anyone seeking to understand how architecture, culture, and health intersect in one of the world's most challenging air quality environments. Tanya - LinkedIn The Air Quality Matters Podcast in Partnership with Zehnder Group - Farmwood - Eurovent- Aico - Aereco - Ultra Protect - The One Take Podcast in Partnership with SafeTraces and Inbiot Do check them out in the links and on the Air Quality Matters Website. If you haven't checked out the YouTube channel its here. Do subscribe if you can, lots more content is coming soon.
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